> > - mremap_userfaultfd_complete(&uf, addr, new_addr, old_len); > > + mremap_userfaultfd_complete(&uf, addr, ret, old_len); > > Not super familiar with this code, but thought I'd ask, does ret > to be checked for -ENOMEM before calling mremap_userfaultfd_complete? > Sorry if I missed something. No, mremap_userfaultfd_complete will do a check similar to offset_in_page() by checking the page mask. It does (to & ~PAGE_MASK) to check for a non-aligned "to" value, so we're good. Additionally, earlier in the process then ctx will be null because we will have never called mremap_userfaultfd_prep, and mremap_userfaultfd_complete will check if there is a context before proceeding. Brian
